package com.leicx.guli.seckill.scheduled;

import com.leicx.guli.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.concurrent.TimeUnit;

/**
 * 秒杀商品定时上架
 * 每天晚上3点，上架最近三天需要三天秒杀的商品
 * 当天00:00:00 - 23:59:59
 * 明天00:00:00 - 23:59:59
 * 后天00:00:00 - 23:59:59
 */
@Slf4j
@Component
public class SeckillScheduled {

    @Resource
    private SeckillService seckillService;

    @Resource
    private RedissonClient redissonClient;

    /**
     * 秒杀商品上架功能的锁
     */
    private static final String UPLOAD_LOCK = "seckill:upload:lock";

    //TODO 保证幂等性问题
     @Scheduled(cron = "*/5 * * * * ? ")
//    @Scheduled(cron = "0 0 1/1 * * ? ")
    public void uploadSeckillSkuLatest3Days() {
        //1、重复上架无需处理
        log.info("上架秒杀的商品...");

        //分布式锁
        RLock lock = redissonClient.getLock(UPLOAD_LOCK);
        try {
            //加锁
            lock.lock(10, TimeUnit.SECONDS);
            seckillService.uploadSeckillSkuLatest3Days();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }
}
